rule win_feed_load_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.feed_load."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.feed_load"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 89431c 0fb60a 83e10f 4a0fbe841100050200 428a8c1110050200 482bd0 8b42fc }
            // n = 7, score = 100
            //   89431c               | dec                 eax
            //   0fb60a               | or                  ecx, 0xffffffff
            //   83e10f               | lea                 eax, [ecx + 1]
            //   4a0fbe841100050200     | cmp    eax, 0x104
            //   428a8c1110050200     | ja                  0xf30
            //   482bd0               | lea                 ebx, [ecx + ecx]
            //   8b42fc               | inc                 esp

        $sequence_1 = { 488905???????? ff15???????? 488d15b7650200 488bcb 488905???????? ff15???????? 488905???????? }
            // n = 7, score = 100
            //   488905????????       |                     
            //   ff15????????         |                     
            //   488d15b7650200       | dec                 eax
            //   488bcb               | lea                 edi, [0x20720]
            //   488905????????       |                     
            //   ff15????????         |                     
            //   488905????????       |                     

        $sequence_2 = { 4881ec60020000 488b05???????? 4833c4 4889842450020000 498bf0 488d05176c0200 488901 }
            // n = 7, score = 100
            //   4881ec60020000       | lea                 esp, [eax + eax*8]
            //   488b05????????       |                     
            //   4833c4               | dec                 ecx
            //   4889842450020000     | mov                 eax, dword ptr [ebp + esi*8]
            //   498bf0               | dec                 eax
            //   488d05176c0200       | mov                 esi, ebp
            //   488901               | dec                 eax

        $sequence_3 = { 418b450c 4d8bf2 418b4d14 4c2bf0 4c03f1 4533e4 4c03f6 }
            // n = 7, score = 100
            //   418b450c             | dec                 esp
            //   4d8bf2               | lea                 eax, [0x21382]
            //   418b4d14             | inc                 ebp
            //   4c2bf0               | mov                 ecx, esp
            //   4c03f1               | dec                 eax
            //   4533e4               | mov                 dword ptr [esp + 0x20], eax
            //   4c03f6               | test                eax, eax

        $sequence_4 = { 8bd8 33d2 488bcf e8???????? 8bcb e8???????? 4c8bcf }
            // n = 7, score = 100
            //   8bd8                 | vmulsd              xmm1, xmm1, qword ptr [ecx + eax*8]
            //   33d2                 | dec                 esp
            //   488bcf               | lea                 ecx, [0x9865]
            //   e8????????           |                     
            //   8bcb                 | vmulsd              xmm0, xmm1, xmm1
            //   e8????????           |                     
            //   4c8bcf               | vfmsub213sd         xmm5, xmm6, xmm1

        $sequence_5 = { 4883c107 48c1e903 483bfe 490f47c9 4885c9 }
            // n = 5, score = 100
            //   4883c107             | mov                 ebp, dword ptr [esp + 0x78]
            //   48c1e903             | dec                 esp
            //   483bfe               | mov                 esi, eax
            //   490f47c9             | jmp                 0x1150
            //   4885c9               | mov                 ebp, dword ptr [esp + 0x60]

        $sequence_6 = { c744242803000000 4889742420 ff15???????? 48894710 4885c0 0f84ce000000 }
            // n = 6, score = 100
            //   c744242803000000     | inc                 esp
            //   4889742420           | sub                 eax, ecx
            //   ff15????????         |                     
            //   48894710             | inc                 ecx
            //   4885c0               | imul                ebx, eax, 0x186a0
            //   0f84ce000000         | inc                 esp

        $sequence_7 = { 4c8bcf 895f38 4c897c2428 4c8d051dfcffff 33d2 44897c2420 33c9 }
            // n = 7, score = 100
            //   4c8bcf               | dec                 eax
            //   895f38               | xor                 eax, esp
            //   4c897c2428           | dec                 eax
            //   4c8d051dfcffff       | mov                 dword ptr [esp + 0x1d0], eax
            //   33d2                 | pop                 edi
            //   44897c2420           | ret                 
            //   33c9                 | dec                 eax

        $sequence_8 = { 8a440c20 4288440c20 4488540c20 420fb6440c20 4903c2 0fb6c0 8a4c0420 }
            // n = 7, score = 100
            //   8a440c20             | dec                 edx
            //   4288440c20           | mov                 eax, dword ptr [ebx + eax*8]
            //   4488540c20           | mov                 ecx, 0x2710
            //   420fb6440c20         | dec                 eax
            //   4903c2               | lea                 ecx, [ebp - 0x40]
            //   0fb6c0               | dec                 eax
            //   8a4c0420             | lea                 edx, [ebp - 0x50]

        $sequence_9 = { ff15???????? 488d159c650200 488bcb ff15???????? 488d15a4650200 488bcb ff15???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   488d159c650200       | lea                 ecx, [0x25ca9]
            //   488bcb               | and                 ecx, 0x3f
            //   ff15????????         |                     
            //   488d15a4650200       | jne                 0x8b0
            //   488bcb               | movups              xmm0, xmmword ptr [eax]
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 512000
}